Improvement in steam pipe and boiler coverings



Patented Feb. 15,1876.

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UNITEDy STATES PATENT OFFICE.

FRANK BALLO-IVI, OF ALLEGHENY, PENNSYLVANIA.

IMPROVEMENT IN STEAM PIPE AND BOILER CQVERINGS.

' Specification fdl-ming part of Letters Patent N o. 173,436, dated February 15, 1876; application led l November 18, 1875.

To all whom it may concern;

Be it known that I, FRANK BALLOU, of Allegheny, county of Allegheny, State oi Pennsylvania, have invented or discovered a new and usef'ul Improvement in Steam Pipe and Boiler Coverings; and I do hereby declare the following to be a full, clear, concise, and exact description thereof, reference being had to the accompanying drawing, making a part of this specification, in whichlike letters indicating like parts- Figure l is a longitudinal section of a pipe having my improved covering, and Fig. 2 is a transverse section thereof.

It has long been common to coat steam and hot water and air pipes, boilers, Src., lwith cement, as a means of preventing, to a greater or less degree, the loss orescape of heat. Such cement has sometimes to Abe applied to such pipes while they are hot, and, ou account of' the sudden and rapid vaporization of the water in the cement, it has been found somewhat difficult to get the cement to harden into a solid coating without blow-holes cracks, or other iinpcrtections; also, the cement, after it does harden, is liable, from various causes, to crumble and break oli'.

The object of my improvement is to remedy these defects. To this end I wrap the pipe B, before applying the cement, with one or more wrapping-s of paper, a, and for this purpose any quality of paper possessing sufficient body and tenacity of fiber to be coated with paste or other adhesive material may be employed. rIhe paper, being socoated, is wrapped around the pipe, so as to adhere thereto, a single wrapping commonly being sufficient. A coatingof cement, b, of one-half inch in thickness, more or less, is thenK applied to the pipo, in vany convenient way. The kind of cement is being what I prefer. Outside the cement I `cement without difculty wrap one or more coatings of paper, c, of any A desired quality, as before; but, in order that it may effcctually prevent` the breaking and crumbling away ofthe cement within, I prefer to apply several thicknesses of paper, so vas to make an exteriorwrapping of, say, half van inch in thickness, more or less. I also find that the heat-radiating powerof paper is so low that such an exterior coating adds `materially to the efliciency of the covering as a preventive of loss or escape of heat.

This exterior paper wrapping maybe applied with paste or other adhesive material, so as to make the successive folds adhere together and form an almost solid covering; or such adhesive material may be omitted.

The interior paperwrapping prevents the rapid and sudden vaporization of the water of the cement, so that I am enabled to apply the and with rapidity, with a good` job as the result.

The same improvement may be applied in like manner to the otherwise exposed' parts of' steam-boilers, or other metallic conduits or receptacles subject to the action of interior heat, with like beneficial results.

I cla-im as my inventionl. A paper wrapping, a, applieddirectlyV onto the heated conduit or receptacle, in combination therewith, and with the celnent covering applied directly on the paper, substantially as set forth.

2. In combination with the interior paper wrapping a and the cement covering, applied as'described, the exterior paper wrapping c, substantially as set forth. J

In testimony whereof I have hereunto set my hand.

FRANK BALLOU.

Witnesses:

JN0. A. WILSON, Gr. H. CHRISTY. 

